try this?
所在版块：社会百科 发贴时间：2004-09-07 11:39

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u can enter bios when open the pc and go to the "others" section.
there is a "System Beep" under that section, disable it and enable it again. then save the changes and restart.

my pc always like that :P whenever i install new software or do some changes, the sound disappears.

maybe this can work :D
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try this? － 七七 　2004-09-07 11:39 (303 bytes , 252reads )
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